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Technical Data Sheet
PartsTable / COMPONENT / J7AB643
J7AB643 ✓ Verified by PartsTable
— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

The TAPPET,ENGINE POPPET VALVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OR STEEL COMP 1015 OVERALL, corner_shape: SQUARE OUTSIDE RIGHT CORNER, flange_width: 0.0625 INCHES NOMINAL IN, overall_length: 0.9880 INCHES MINIMUM AND 1.0020 INCHES MAXIMUM IN, style_designator: SOLID, EXTERNAL FLANGE ONE END, body_inside_diameter: 1.6860 INCHES MINIMUM AND 1.6870 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-287-7711, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
J7AB643
NSN: 3120-00-287-7711
FSC: 3120
CAGE: 7PZX0 — FAIRBANKS MORSE, LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OR STEEL COMP 1015 OVERALL
corner_shapeSQUARE OUTSIDE RIGHT CORNER
flange_width0.0625 INCHES NOMINAL IN
overall_length0.9880 INCHES MINIMUM AND 1.0020 INCHES MAXIMUM IN
style_designatorSOLID, EXTERNAL FLANGE ONE END
body_inside_diameter1.6860 INCHES MINIMUM AND 1.6870 INCHES MAXIMUM IN
body_outside_diameter2.3610 INCHES MINIMUM AND 2.3620 INCHES MAXIMUM IN
flange_outside_diameter2.6875 INCHES NOMINAL IN
NSN3120-00-287-7711
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: J7AB643 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
BODY OUTSIDE DIAMETER: 2.3610 INCHES MINIMUM AND 2.3620 INCHES MAXIMUM IN
•
FLANGE WIDTH: 0.0625 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 1.6860 INCHES MINIMUM AND 1.6870 INCHES MAXIMUM IN
•
FLANGE OUTSIDE DIAMETER: 2.6875 INCHES NOMINAL IN
•
CORNER SHAPE: SQUARE OUTSIDE LEFT CORNER
TECHNICAL CHARACTERISTICS (FLIS)
BODY OUTSIDE DIAMETER2.3610 INCHES MINIMUM AND 2.3620 INCHES MAXIMUM IN
FLANGE WIDTH0.0625 INCHES NOMINAL IN
OVERALL LENGTH0.9880 INCHES MINIMUM AND 1.0020 INCHES MAXIMUM IN
BODY INSIDE DIAMETER1.6860 INCHES MINIMUM AND 1.6870 INCHES MAXIMUM IN
FLANGE OUTSIDE DIAMETER2.6875 INCHES NOMINAL IN
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
CORNER SHAPESQUARE INSIDE RIGHT CORNER
CORNER SHAPEROUND LEFT FLANGE BODY CORNER
MATERIALSTEEL COMP 1010 OR STEEL COMP 1015 OVERALL
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
667-3Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-781Interchangeable
interchangeable cross-reference
interchangeable
7909Interchangeable
interchangeable cross-reference
interchangeable
003LInterchangeable
interchangeable cross-reference
interchangeable
52841Interchangeable
interchangeable cross-reference
interchangeable
GGG-G-17 TY8CL4STAInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is J7AB643?
J7AB643 is a TAPPET,ENGINE POPPET VALVE.
What parts can replace J7AB643?
There are 25 known substitutes for J7AB643: 667-3, MIL-DTL-781, 7909 and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for J7AB643?
J7AB643 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-287-7711. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026